About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Strengthening Polylactic Acid and Thermoplastic Elastomer Blends through Thermoforming to Reorient Extrusion Paths |
Author(s) |
Pamela Edith Campos Valles, Roger V Gonzalez, Joshua T Green |
On-Site Speaker (Planned) |
Pamela Edith Campos Valles |
Abstract Scope |
Fused filament fabrication is compatible with thermoplastics which are commonly used for thermoforming. Structures printed through fused filament fabrication are often weaker along the build direction due to the interface bond strength between layers. In contrast to conventional printing methods, thermoforming can alternatively be used to reorient extrusion paths and increase strength relative to a particular load direction. Through use of a fused filament fabrication printer with an active-mixing hotend, sheets with rectilinear infill were printed with a variety of uniform blends of polylactic acid and thermoplastic polyurethane. The sheets were then thermoformed to reorient extrusions relative to the printer’s build orientation and stretch the material as is common in thermoforming applications. Tensile tests were performed to compare the effects of thermoforming as compared to specimens printed in the same orientation. Results indicate an ability to favorably modify tensile properties through thermoforming rather than orientation of print direction alone. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |